Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer is a photosensitive layer having an electron transport layer, a charge generation layer and a hole transport layer which are layered in this order from the support side, and the electron transport layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2) or the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3).

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer is a photosensitive layer having an electron transport layer, a charge generation layer and a hole transport layer which are layered in this order from the support side, and the electron transport layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2) or the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3), in an amount of from 80% by mass to 100% by mass based on the total mass of the electron transport layer.

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2), and the repeating structural unit represented by the formula (1) is in a proportion of from 50 mol % to 99 mol % based on all the repeating structural units in the copolymer.

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2), and the repeating structural unit represented by the formula (1) is in a proportion of from 70 mol % to 99 mol % based on all the repeating structural units in the copolymer.

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2), and the repeating structural unit represented by the formula (2) is in a proportion of from 1 mol % to 30 mol % based on all the repeating structural units in the copolymer.

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3), and the repeating structural unit represented by the formula (1) is in a proportion of from 50 mol % to 99 mol % based on all the repeating structural units in the copolymer.

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3), and the repeating structural unit represented by the formula (1) is in a proportion of from 70 mol % to 99 mol % based on all the repeating structural units in the copolymer.

The electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer contains the copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3), and the repeating structural unit represented by the formula (3) is in a proportion of from 1 mol % to 30 mol % based on all the repeating structural units in the copolymer.

A process cartridge which integrally supports the electrophotographic photosensitive member according to claim 1 and at least one device selected from the group consisting of a charging device, a developing device, a transfer device and a cleaning device, and is detachably mountable to the main body of an electrophotographic apparatus.

An electrophotographic apparatus comprising the electrophotographic photosensitive member according to claim 1, a charging device, an exposure device, a developing device and a transfer device.